Walkway in the rainforest at Mossman Gorge, Queensland, Australia.
This is a part of a 3D-panorama.
Thanks to Jason Buchheim (odyssey) this can be viewed in a 'cross-view' stereo 3-D viewer here: www.3dpan.org/39515-39514-0.25-.18-360-360 and many more 3-D panoramas here: www.3dpan.org